“The cavalry, in particular, were not friendly to the aeroplane, which it was believed, would frighten the horses.” ParticularHorseAviationFriendlyAeroplanesAir PowerAirpowerNot FriendsCavalry Book:The War in the Air: Being the Story of the Part Played in the Great War by the Royal Air Force ... Source: The War in the Air: Being the Story of the Part Played in the Great War by the Royal Air Force ...